Package manager UI-related tweaks (#4382)

* Add Plugins Path setting
* Fix/improve cache invalidation
* Hide load error when collapsing package source
* Package manager style tweaks
* Show error if installed packages query failed
* Prevent "No packages found" flicker
* Show <unknown> if empty version
* Always show latest version, highlight if new version available
* Fix issues with non-unique cross-source package ids
* Don't wrap id, version and date
* Decrease collapse button padding
* Display description for scraper packages
* Fix default packages population
* Change default package path to community
---------
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

internal/manager/config/config.go

@@ -138,7 +138,7 @@ const (
 	PluginsSettingPrefix = PluginsSetting + "."
 	DisabledPlugins      = "plugins.disabled"
 
-	sourceDefaultPath = "stable"
+	sourceDefaultPath = "community"
 	sourceDefaultName = "Community (stable)"
 
 	PluginPackageSources        = "plugins.package_sources"
@@ -1666,16 +1666,16 @@ func (i *Config) setDefaultValues() {
 	i.main.SetDefault(NoProxy, noProxyDefault)
 
 	// set default package sources
-	i.main.SetDefault(PluginPackageSources, map[string]string{
-		"name":       sourceDefaultName,
-		"url":        pluginPackageSourcesDefault,
-		"local_path": sourceDefaultPath,
-	})
-	i.main.SetDefault(ScraperPackageSources, map[string]string{
-		"name":       sourceDefaultName,
-		"url":        scraperPackageSourcesDefault,
-		"local_path": sourceDefaultPath,
-	})
+	i.main.SetDefault(PluginPackageSources, []map[string]string{{
+		"name":      sourceDefaultName,
+		"url":       pluginPackageSourcesDefault,
+		"localpath": sourceDefaultPath,
+	}})
+	i.main.SetDefault(ScraperPackageSources, []map[string]string{{
+		"name":      sourceDefaultName,
+		"url":       scraperPackageSourcesDefault,
+		"localpath": sourceDefaultPath,
+	}})
 }
 
 // setExistingSystemDefaults sets config options that are new and unset in an existing install,